{"id":"CVE-2022-21659","aliases":["GHSA-wfjw-w6pv-8p7f","PYSEC-2022-24"],"url":"https://o3.security/vulnerability/CVE-2022-21659","summary":"Observable Response Discrepancy in Flask-AppBuilder","details":"### Impact\nUser enumeration in database authentication in Flask-AppBuilder  < 3.4.4. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in.\n\n### Patches\nUpgrade to 3.4.4\n\n### Workarounds\n\n### References\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [example link to repo](http://example.com)\n* Email us at [example email address](mailto:example@example.com)","published":"2022-01-31T20:20:40Z","modified":"2026-08-12T03:51:36.490265829Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00953,"percentile":0.59589,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"flask-appbuilder","fixedVersion":"3.4.4"}],"fix":{"url":"https://github.com/dpgaspar/Flask-AppBuilder/pull/1775","label":"dpgaspar/Flask-AppBuilder#1775"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21659.json"},{"type":"ADVISORY","url":"https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21659"},{"type":"FIX","url":"https://github.com/dpgaspar/Flask-AppBuilder/pull/1775"},{"type":"WEB","url":"https://github.com/dpgaspar/Flask-AppBuilder/commit/e2b744c258ff62ece9d5ac7172c3b4644ff4c2fe"},{"type":"PACKAGE","url":"https://github.com/dpgaspar/Flask-AppBuilder"},{"type":"WEB","url":"https://github.com/dpgaspar/Flask-AppBuilder/commits/v3.4.4"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2022-24.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:36.490265829Z"}}